Transmission mechanism.



H. B. ROSS.

TRANSMISSION MBGHANISM,

APPLICATION FILED MAY17, 1912. gym@ 33g, Patented Aug, w, 1913.

3 SHEETS-*SHEET 2.

THAN SMISSION MEa ich , intense.

mirren sara ritirarsi-:l einem@ HARRY BEAUREGARD ROSS, O F DENVER, COLRAO, ASSIG'NOR '.LO THE ROSS TRANS- MISSION GEAR COMPANY, OF DENVER, COLORADO, A CORFOR-ATION OF COLORADO.

'\ Timnsiviission Meenemen.

Specification of Letters Patent.

Application filed May 17,1912. Serial No.269762.

'[0 ad wn-cfm, zo may concern:

vBe it known that I, HARRY B. Ross, resid ing at Denver, in the county of Denver and State v of Colorado, have invented certain `new and useful Improvements in Transmis` there are provided aseries of eccentric and concentric-gears on the driving shaitwitli which a vslnta-hle ygear on a counter sha-ft meshes, =the. sliiftin ear being both 'lateri ally shiftable and s `iita'hle in' its own plane so as to enable its cooperation With the concentric and eccentric gears ott-various diameters. in' that patent also an arm device f was providedthat Wasrcarried by the counjter shaft and gear which was mounted to re ciprocatc and be operated by a set el? concen` ltregflihd eccentric vdisks on `the driving shaft "tolio-ldthe shiftable vgear in mesh with the driving shaft gears at all tinies.

My vpresent invention differentiates from what is disclosed .in the patent referred toiii this, that there is provided, in place of the vshiftable. arm, abell crank lever which is laterally shiftable with the shiftable gear f, but not bodily sliiftable with the sliiftable gear when it moves in its own plane. The

bell crank lever is cooperatively connected `vwithr the shiftable gear and with the devices .which ceperate .to .hold the shiftable gear in inesh with the driving shaft gears.

. My present invention furtherA dii'erentiates `troni the patent referred to, inl the ineens which are provided for holding the lbell. crank lever in position to maintain the wz. sliittable `rear in mesh with the concentric qears,f:\nd it also differentiates iioni .the pat# txaipresaidin providinga modiiied forni oi' yresilient device for efl'ecting the shifting :fof*thebell` crank and sliiitable gear laterikal'ly., along the counter .shaft to bring the sliiftable gear into meshv with the various drivingl shaft gears.

The present invention `also includes a spef 'A ,ciall devicelcoiperative with the bell crank lever forv late ln'n-g it in its various change lspeerlil positions.

Figa 1 looking in the direction-oi? the arrow.

Fig. 3 is a view similar `to Fig. 1 of a modification of the invention. Fig. i is a section on the line 4--4 of Figa 3... Fig. 5 is a detail view la-reely diagrammatic, illustrating further nio itication of the invention, and Fig. 6 is a detail cross section on the line 6-6 of A Fig. 3. Fig. 7 is a viewfsilnilar to Fig. 1 of another form of :the invention. Fig. 8 is a cross section on the line S-- of Fig. 7 taken in the direction-'fof thearrow.4 Fig. 9'is a detail section on 'the line 1li-A of Eig. S, looking iii the directional? the arrow; Figs. y1() and 11 are detail views showing the action of the gears with relation 'to each other. Referring now to the accompanying drawings, in which like numerals and .letters of reference designate like parts in all the figures, 1 represents the transmission casing or 'slots 16 in the traine 1.`A Mounted on the shaft S and lieyed to turn with it, but slidahle along it, is the shiitalolc gear 1'4" which is adapted to mesh with the series of con ycentric gears 18, 19 and .2O and the inter veiling; eccentric gears 21 and 22, as may be desired. The gear 17 is also adapted'. to mesh with the reversing pinion 28. In ad dition to the gears on the driving shaft 2, a set of concentricv disks 25, 26, 27 and28, are provided with intervening eccentric disks 29 and 30 to cooperate with the mechanifsm that holds the gears 17 in mesh vvitliA the gears 1? to 23 inclusive.

oted on the shifting rod 36,

notches 32, 33, 34 and v35 to coperate with the latching portion 39 of the bell crank lever 38. The bell crank lever 38 is pivwhich is relatively tixedly located'and mounted in bearings 37. The lever 38 has a finger 39 to coperate with the various disks to 30 inclusive, and it has bifurcated arms 40,

I the ends of which are provided with openywill be .readily understood by those ings to receive the sleeve"7l, that iskeyed to the shaft 8 and carries .the gear -17 Be tween the bifurcations 40, the shifting rod 36, is slotted or grooved, as at 42, and provided with collars 43, which are shifted along the rod 36 within the limits of the slots 42, the collars 43 having pins 44 to enter the slots 42. Between the collars 44, (he compression spring 45,' is located and it is by means of this spring that the desired force is applied to shift the bell crank lever 38 laterally to change speed.

The manner in which the form of my in` vention, shown/ in Figs. 1 and 2,'operates, skilled in the art. Assume that the'parts are positioned as shown in full lines of that ligure,

, it will be the indirect high speed drive, and assume that it is desired to shift the gears to a lower `speed, the operator imparts movement to the lever 49 to move the rod '36 in the'directionbf "thearrowin Figyl, thereby moving the collar 43 at the left to compress the spring45 and apply ,a force against the right hand fork of thelev'er 38 to tend to move the same from the position shown in full lines in Fig. 1 vtoward the po sition shown in dotted lines. As soon as the eccentric disk 29 has turned around sufficiently to enable the finger 39 to pass' on te it, the spripg 45 Will move' the lever 38 and gear 17 from left -to right in' Fig. 1 until the finger 39 is riding on the eccentric disk 2.9. and thegear 17 is in the plane of the eccentric gear-22. The eccentric disk 29 rocks the bell crank 38 to cause the gear 17 to follow the eccentric gear 22, during one-half revolution of the driving shaft 2 for soon as the linger 39 is free to pass olf` the disk 29 onto the disk 26, the spring 45 will effect the required' movement and bring the gear 17 into mesh with 'the' gear 19. vAt this time also,

the bell'crank 38.vvill rest in the recess'l33 the latching portion 39 of' lever 7 6 lthat-,is pivoted at outward limit of the slots 42. In'shifting from lower speeds to higher speeds a reverse operation takes place.

It will be noted that the bell crank lever 38 does not shift bodily in its own plane, but merely rocks on the relatively fixedly located rod 36.

In place of the concentric disks 25, 26, v27, and 28, I may use a fixed bar having portions 51, 52 and 53 to coperate wit-h the linger 39 and retain the bell crank. lever 38 in its position, whereby the gear 17 will be in mesh with the ruiming gears 18, 19, and 20, or the reversing pinion 23, as will be clearly understood by reference to Fig. 3 of the drawings. In place'of the spring 45 air pressure may be employed as willbe understood bv reference to Fig. 5 of the drawings.' It will be noted by reference to this figure that the shifting rod 54 that corresponds to the rod 36 in Fig. 1, is provided with apiston 55 that works in a cylinder 56 which is located between the bifurcations 40 of the bell crank lever 38. The cylinder 56 is plugged at 57 to'form an air tight connection; and it has a central air inlet port 58 as indicated. The rod'54 atl each side 'of the piston 55, is also provided Withports 6() and 62 thatregister respectively with ducts 59 and 61. The shifting rod 54 is shifted by a hand lever 63, that is mounted on a suitable shaft 66 to which an arm 65 is connectedthe arm being connected at 64 to the shaft 54. A suitable latch 68 is provided in connection with the lever 63 that coperates with latch notches 67, 68, 69 and 70 in an are segment, as is clearly shown in Fig. 5 of the drawings.

When it is desired to shift the bell crank A lever from one changespced position to' another, the lever 63 is moved to the corresponding notch in the are segment whereby to move the piston 55 to one end o1l the other of the cylinder 56 and then air or expansionable gases is let in ahead otfit through a suitable valve 46, which pressure' will 'move the bell crank accordingly from one position tothe other, as soon as the finger 39 is released by the eccentric gear 29 or 30 as the case may The form shown on Sheet 3 of thedrawings in F ig. 7 et seq. differs from that shown in the preceding figures in that, the gears 21 provided with bevel portions 82 'for a purpose hereinafter explained, Thebridge 72,

of the member 38, is provided vwithfa series of apertures or recesses onefor each speed. 74/designates asupport ywhich is secured to the frame ofthe gearing in any suitab1 e way, and which` carries a bell crank 75, and has a pin and 22, and the eccentrics29 andl30 arev 7 S designates a releasing rod which is provided with a' pair ofjsprings 79 that co'- operate With-the bell crank lever 7 rlhe springs 79 abut Washers 80 that slide freely on the rod 7 8, adjacent to the lever '76, and ins or cotters 8l are provided to h old the spring 7,9` to its minimum compression. The

` operation of shifting from one running po sition to another is essentially the same so far as the Igears are concerned as in the other form of invent-ion, the difference, however, residing in the following matter: The

l.lixivels'ion the eccentric disks 29 and 30 and on the eccentric gearsv 21 and 22 allow the bell crank arm 38 and. gears 17 a slight movement in the direction-of the shift and at the place f shift, when the spring has beengcompressed by a movement of the rod 36. Since the pin 77 is in the hole 73, the bell crank carrying gears 17. does .not shift until the pin 77 is pulledfree ofthe hole 73. A movement of the rod 78 in the direction of the arrow. causes the spring7 9 at the left of the bell crank lever 76', in Fig. 9, to compress, thereby j applying aforce .tending to rock the bell crank leverJ 76 in a direction to release the pin77. Now -in virtueof the bevels 82, the gears 17'will move eno-ugh to hind the pin 77 in the -hole-73 thus .the pinr 7.7I `cannot beV pulled out o the hole 73. by. the. compressed springs 79 und bell crank 76 to\allow the gears 17 to' shift onto an eccentrid until the bevels have thrown the ears 17 and consequently the arms 3S back to a normal posit-ion on a true speed gear as 19, thus, preventing a late shift of the gears 17 andqmember 38. By reference to Figs. 10 and Il, it will be seen that if the gear 117 is released to shift (if it is possible to pull the pin v77)at a point 83,

then the geant/7 Wouldfhave to shift onto `the eccentric 2in a 'short'.interval of time,

as the tooth at 83 is the last 'tooth in aline- .menton the' gear 19`With a tooth on the ec- `centric gear 0n the other hand thereI are several teeth in alineinent between the gears l?) and 22 for example, 'for the shift of the gears 17 to take place, provided, the shift can loe started at or before the tooth Si is The bevel '82 on the sides of the gear 9.2 ishest indicated in Fig. 8 and When the gear 17 is pressed against this bevel, the pin 77 will bind so that it cannot be pulled, consequently no shift of the bell crank carrying gear "i7 can take place'unless the pin 77 has been pulled before the gear 17 or bell crank member 38--89 have reached their respective beve-lst From thc foregoing description taken in I connection With the accompanying dravvings, it is believed the complete constrncnordsee Ytion,operation and advantages of the invenshaft and shiftable along the saine vto mesh with the various gears of the driving Shaft, a bell crank shifting lever connected and shiftahle with said shiftable gear, and means `coliiointive with said bell crank lever for holding said shiftable gear vin mesh xvi-th said driving shaft gears.

2; ln .a transmission gear "mechanism, 4a

driving shaft, a plurality of gears of different diameters on said driving shaft, a` sec.-

-ond shaft, a'gear shiftably mounted on said second shaft tov he movable along theysame,

a shifting rod, a `bellycranklever f ulcrumed on said shifting rodandconnectible with said shiftable gear to move bodily with the same, means yfor shifting said bell. crank lever to shift.v said shiftable gea-r into the planes of said driving shaft gears respec- -tively, and means cooperative with said bell crank lever for maintaining saidfshiftable 'gear in mesh with said Adriving shaft gears.

'8. In a transmission gear mechanism, a driving shaft, a plurality of gears of different dianieters on said drivingshafhn second shaft, a gearshiftably mounted on said sec.

Jond shaft to be', movable along the` same, a

shifting rodpabellcranklever fulcrumed on .said shifting rod and connectible With said shiftnhle gear tomove bodily' with the same, means for shifting 'said bell crank lever to shift said 'shiftable gear'into theplanes of said driving shaft gearsrespectively, Aand means cooperative with said bell crank le-.

ver for'maintaining 'said shiftable, gear in mesh with said rdriving .shaft gears, said driving shaft gears includingfalternately ar ranged concentric and eccentric gears, and said last named bell crank coperating means including la device forv holding said bell crank' to maintain said shift-able' gear in mesh with said concentric ydriving shaft gears, and valso including means yon. seid Adriving shaft for engaging said bell crank lever when said shiftable gear is in the planes o f'said eccentric gears to maintain said slnl'tahlcgear in mesh with said eccenH tric gears.

el. ln a; trmisinlssion gear mechanism. a. a u u a l d r1 vlng sha ft, a plurality of gears of different diameters on said driving shaft, a second shaft, a gear shiftaloly mounted on said second shaft 'to be movable along the same, a shifting rod, a bell crank lever fulcrumed on said shifting rod and connectible' with said shiftable gear to move bodily with the sinne, means for shifting said bell. crank lever to shift said shiftable gear into the planes of said driving shaft gears respectively, and means eoperative with said bell crank lever for maintaining saidv shiftable gear inmesh with Asaid driving shaft gears, and a latching device to coperate with said bell crank lever to latch thesame in each running position.

5. In a 'transmission gear mechanism, a driving shaft, a plurality of gears of different diameters on said driving shaft, a second shaft, a gearshiftably mounted on said second shaft to be movable along the sa1ne,`a. shifting rod, a bell crank lever fulcrumed on .said shifting rod and connectible with said shiftable gear t?) move bodily with the same, means for shifting said bell crank lever to shift said shiftable gear into the planes of said driving shaft gears respectively, and means coperative with said bell crank lever for maintaining said shiftable gear in mesh with said driving shaft gears, said driving shaft gears including alternately arranged concentric and eccentric gears, and said last named bell crank cooperating means including a device for holding said bell crank to maintain said shiftable gear in mesh with said concentric driving shaft gears, and also including means on said driving shaft for engaging' said bell.

. crank lever when said shiftable gear is in I. second shaft, a

said shiftable the planes of said eccentric gears to maintain gear in mesh with said eccentrlc gears,said eccentric gears having bevel portions on onev face, said bell crank lever having a portion provided with a series of apertures, a stop pin loosely projectable into said apertures in turn, said bevel portions allowing of said pin to bind in said apertures, and means for withdrawing said pin when the binding pressure has been released.

F. In a transmission gear mechanism, a driving shaft, a plurality of gears of different diameters on said driving shaft, a gear shiftably mounted on said second shaft to be movable along the same, a shifting rod, a bell crank lever fulcrumed on said shifting rod and connectible with said shiftable gear to move bodily with the same, means for shifting said bell crank' lever to shift said shiftable gear into the lanes of said drivinor shaft (Years res nece, b l

'tivel v, and means coperative with said bell crank lever for maintaining said shiftable gear in mesh with said driving shaft gears, said driving shaft gears including alternately arranged concentric and eccentric gears, and said last named bell crank cooperating means including a device for 'holding said bell crank to maintain said shiftable gear in mesh with said concentric driving shaft gears, and also including means on said driving shaft for engaga.I g said bell crank lever when' said shiftable gear is in the planes of said eccentric gears to maini tain-said shiftable gear in mesh with said eccentric gears, said eccentric gears having bevel portions on one face, said bell. crank lever having a portion provided with a series of apertures, a stop pin loosely projectable into said apertures in turn, said bevel portions allowing of said pin to bind in said apertures, and means for vwithdrawing said pin when the binding pressure has been released, said last named means comprising a bell crank lever connected with said pin, and means for storing up a force tending to move said bell crank lever in a direction to release .said pin, said force acting when the binding pressure on said pin is released. l 7. In a transmission gear mechanism, a driving shaft,` plurality of gears of different diameters on said shaft, a set of eccentric gears on said shaft having bevel portions, a second shaft, a shiftable gear on said second shaft coperating with` said gears and said bevel portions, means for applying a shifting force to said shiftable gear, and a latch device for holding said shiftable gear in alinement with the respective eccentric gears, said latch device adapted to be held by frictional contact from re lease when said shiftable gear is shifted to,-` ward said bevel portion,

on said eccentric gear to device, and means for withdrawing said latch device from its latching position upon its release.

HARRY BEAUREGARD ROSS.

lVitnesses N. E. Mn'rznnn, J os. H. BLOCK.

said bevel portion.` adaptable to shift said shiftable gear back release said latch ojo 

